Origin/suggest relevant envs

[lovestaco]

What type of MR is this?

• [x] 🍕 Feature
• [ ] 🐛 Bug Fix
• [x] 📝 Doc Update
• [ ] 🎨 Style
• [ ] 🧑‍💻 Code Refactor
• [ ] 🔥 Performance Improvements
• [x] ✅ Test
• [ ] 🤖 Build
• [ ] 🔁 CI
• [ ] ⏩ Revert

Description

• This MR adds the feature of providing environment variables relevant to input.
• To provide relevant variables making use of trie.

Issue

More autocomplete problem

Important files to start review from

controller.go

l2 --help

Usage:
  l2 [OPTIONS] [LamaAPIFile]

Application Options:
  -o, --output=      Path to output JSON file to store logs, headers and result
  -v, --verbose      Show verbose debug information
  -b, --prettify     Prettify specified .l2 file
  -c, --convert=     Generate code in given language and library (ex: python.requests); reference: tinyurl.com/l2codegen
  -n, --nocolor      Disable color in httpie output
  -u, --update       Update l2 binary to the latest released version (Linux/MacOS only)
  -p, --postmanfile= JSON export from Postman (Settings -> Data -> Export Data)
  -l, --lama2dir=    Output directory to put .l2 files after conversion from Postman format
  -h, --help         Usage help for Lama2
  -e, --env=         Get a JSON of environment variables revelant to input arg (default: UNSET)
      --version      Print Lama2 binary version

Help Options:
  -h, --help         Show this help message

Added tests?

• [x] 👍 yes
• [ ] 🙅 no, because they aren't needed
• [ ] 🙋 no, because I need help

Added to documentation?

If documentation update is there then run make mkdocs once PR is in acceptable state.

• [x] 📓 make mkdocs
• [ ] 📜 README.md
• [ ] 🙅 no documentation needed

[shrsv]

Please mention relevant issues in description, so that they get tracked, and eventually closed.

[shrsv]

Let's set default value to UNSET_VU5TRVQ just to avoid conflicts with a genuine value such as UNSET