[RTC-548] Allow underscore in room IDs, rename leftover files

[sgfn]

Acknowledging the stipulations set forth:

• [x] I hereby confirm that a Pull Request involving updates to the Software Development Kit (SDK) has been smoothly merged, currently awaits processing, or is otherwise deemed unnecessary in this context.
• [x] I also affirm that another Pull Request, specifically addressing updates to the documentation body (commonly referred to as 'docs'), has either been successfully incorporated, is in the process of review, or is considered superfluous under the prevailing circumstances.

ref: https://github.com/fishjam-dev/fishjam-docs/pull/113

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 87.23%. Comparing base (64f7e38) to head (f809dc5).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #201 +/- ## ======================================= Coverage 87.23% 87.23% ======================================= Files 74 74 Lines 1536 1536 ======================================= Hits 1340 1340 Misses 196 196 ``` | [Files](https://app.codecov.io/gh/fishjam-dev/fishjam/pull/201?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-dev) | Coverage Δ | | |---|---|---| | [lib/fishjam.ex](https://app.codecov.io/gh/fishjam-dev/fishjam/pull/201?src=pr&el=tree&filepath=lib%2Ffishjam.ex&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-dev#diff-bGliL2Zpc2hqYW0uZXg=) | `100.00% <ø> (ø)` | | | [lib/fishjam/application.ex](https://app.codecov.io/gh/fishjam-dev/fishjam/pull/201?src=pr&el=tree&filepath=lib%2Ffishjam%2Fapplication.ex&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-dev#diff-bGliL2Zpc2hqYW0vYXBwbGljYXRpb24uZXg=) | `51.42% <ø> (ø)` | | | [lib/fishjam/component.ex](https://app.codecov.io/gh/fishjam-dev/fishjam/pull/201?src=pr&el=tree&filepath=lib%2Ffishjam%2Fcomponent.ex&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-dev#diff-bGliL2Zpc2hqYW0vY29tcG9uZW50LmV4) | `75.00% <ø> (ø)` | | | [lib/fishjam/component/file.ex](https://app.codecov.io/gh/fishjam-dev/fishjam/pull/201?src=pr&el=tree&filepath=lib%2Ffishjam%2Fcomponent%2Ffile.ex&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-dev#diff-bGliL2Zpc2hqYW0vY29tcG9uZW50L2ZpbGUuZXg=) | `100.00% <ø> (ø)` | | | [lib/fishjam/component/hls.ex](https://app.codecov.io/gh/fishjam-dev/fishjam/pull/201?src=pr&el=tree&filepath=lib%2Ffishjam%2Fcomponent%2Fhls.ex&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-dev#diff-bGliL2Zpc2hqYW0vY29tcG9uZW50L2hscy5leA==) | `96.77% <ø> (ø)` | | | [lib/fishjam/component/hls/ets\_helper.ex](https://app.codecov.io/gh/fishjam-dev/fishjam/pull/201?src=pr&el=tree&filepath=lib%2Ffishjam%2Fcomponent%2Fhls%2Fets_helper.ex&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-dev#diff-bGliL2Zpc2hqYW0vY29tcG9uZW50L2hscy9ldHNfaGVscGVyLmV4) | `100.00% <ø> (ø)` | | | [lib/fishjam/component/hls/httpoison.ex](https://app.codecov.io/gh/fishjam-dev/fishjam/pull/201?src=pr&el=tree&filepath=lib%2Ffishjam%2Fcomponent%2Fhls%2Fhttpoison.ex&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-dev#diff-bGliL2Zpc2hqYW0vY29tcG9uZW50L2hscy9odHRwb2lzb24uZXg=) | `0.00% <ø> (ø)` | | | [lib/fishjam/component/hls/ll\_storage.ex](https://app.codecov.io/gh/fishjam-dev/fishjam/pull/201?src=pr&el=tree&filepath=lib%2Ffishjam%2Fcomponent%2Fhls%2Fll_storage.ex&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-dev#diff-bGliL2Zpc2hqYW0vY29tcG9uZW50L2hscy9sbF9zdG9yYWdlLmV4) | `76.31% <ø> (ø)` | | | [lib/fishjam/component/hls/manager.ex](https://app.codecov.io/gh/fishjam-dev/fishjam/pull/201?src=pr&el=tree&filepath=lib%2Ffishjam%2Fcomponent%2Fhls%2Fmanager.ex&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-dev#diff-bGliL2Zpc2hqYW0vY29tcG9uZW50L2hscy9tYW5hZ2VyLmV4) | `97.05% <ø> (ø)` | | | [lib/fishjam/component/hls/recording.ex](https://app.codecov.io/gh/fishjam-dev/fishjam/pull/201?src=pr&el=tree&filepath=lib%2Ffishjam%2Fcomponent%2Fhls%2Frecording.ex&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-dev#diff-bGliL2Zpc2hqYW0vY29tcG9uZW50L2hscy9yZWNvcmRpbmcuZXg=) | `89.47% <ø> (ø)` | | | ... and [59 more](https://app.codecov.io/gh/fishjam-dev/fishjam/pull/201?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-dev) | | ------ [Continue to review full report in Codecov by Sentry](https://app.codecov.io/gh/fishjam-dev/fishjam/pull/201?dropdown=coverage&src=pr&el=continue&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-dev). > **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-dev) > `Δ = absolute (impact)`, `ø = not affected`, `? = missing data` > Powered by [Codecov](https://app.codecov.io/gh/fishjam-dev/fishjam/pull/201?dropdown=coverage&src=pr&el=footer&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-dev). 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