[NEW][WIP] Add Jitsi component

[Dnouv]

This PR adds a new Jitsi component using Jitsi's React SDK Here is a screenshot of the demo page,

Thank you!

[lgtm-com[bot]]

This pull request introduces 2 alerts when merging 4e0ff01987463b3c8ec5196894508fe5c7f6e1db into 093018016c3d11186fd18315b70134c1916b5c63 - view on LGTM.com

new alerts:

• 2 for Unused variable, import, function or class

[Sing-Li]

Hi @Dnouv Thanks for the PR. A lot of this work has actually been done, as part of the virtual conference coming up - in the "Greenroom".

See https://github.com/RocketChat/RC4Community/blob/master/app/pages/virtualconf/greenroom/index.js#L5

Please see if you can "tune this component" to the following:

1. Anyone with access to /greenroom will see one another as in a regular Jitsi conference
2. Set the component to "Live Stream" to an rtmp forest

Adding the two above will allow us to conduct the Alumni Summit with RC4Community.

[lgtm-com[bot]]

This pull request introduces 1 alert and fixes 1 when merging a078deff8eda7374dcb9b56fcde2c5e17e284e26 into 637ede7c37c56740edd173ffd5dd150585202e6a - view on LGTM.com

new alerts:

• 1 for Unused variable, import, function or class

fixed alerts:

• 1 for Unused variable, import, function or class

[lgtm-com[bot]]

This pull request fixes 3 alerts when merging 6cb0fb311399e6c22cc64a166e3765e6793afff4 into 54d6bbd9fd9449b4b779dae07e3e59f3ee841f8f - view on LGTM.com

fixed alerts:

• 3 for Unused variable, import, function or class

[lgtm-com[bot]]

This pull request fixes 5 alerts when merging 03349662acc3793ff349705fb8fed4ef528a5891 into be232503a07302e50e8a379babcc75ae0342b7f3 - view on LGTM.com

fixed alerts:

• 5 for Unused variable, import, function or class

[lgtm-com[bot]]

This pull request fixes 5 alerts when merging 17ee6908ef5c216ce8feeabbd7fc89c7b936606f into 7d80e8f1f2cbd3760d968271f6169826424253a8 - view on LGTM.com

fixed alerts:

• 5 for Unused variable, import, function or class

[lgtm-com[bot]]

This pull request fixes 5 alerts when merging 8cbdd50639d090d1c96d69607b959188792ccf3a into 86514076c6cc8cc95cbb11318c99c81ee0fdb341 - view on LGTM.com

fixed alerts:

• 5 for Unused variable, import, function or class

[lgtm-com[bot]]

This pull request fixes 5 alerts when merging f95f25912b569ca79f59838a71a5721690dff2d8 into 86514076c6cc8cc95cbb11318c99c81ee0fdb341 - view on LGTM.com

fixed alerts:

• 5 for Unused variable, import, function or class