[cli] Refactor vc teams to TypeScript

[TooTallNate]

Refactors the four vc teams related subcommands to TypeScript, and removes the NowTeams class that subclassed from the legacy Now class. All for a net reduction of ~50 LOC!

[codecov]

Codecov Report

Merging #6610 (f36ecbe) into main (578fe8a) will increase coverage by 0.19%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #6610      +/-   ##
==========================================
+ Coverage   12.46%   12.66%   +0.19%     
==========================================
  Files         263      265       +2     
  Lines        9691     9651      -40     
  Branches     1693     1711      +18     
==========================================
+ Hits         1208     1222      +14     
+ Misses       8384     8331      -53     
+ Partials       99       98       -1     

Impacted Files	Coverage Δ
src/index.js	0.00% <0.00%> (ø)
src/util/output/chars.ts	0.00% <0.00%> (ø)
src/commands/teams/index.ts	0.00% <0.00%> (ø)
src/commands/teams/list.js
src/util/teams.js
src/commands/teams/invite.js
src/commands/teams/add.js
src/util/get-team-by-id.ts
src/util/get-teams.ts
src/util/teams/invite-user-to-team.ts	0.00% <0.00%> (ø)
... and 8 more

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