docs: update telegram, matrix and cli output

[piksel]

Bulk updates to the documentation, clarifying telegram chats and matrix URL schema.
Also replaces the enum types in shoutrrr docs with a static option string when using the console renderer.

[codecov]

Codecov Report

Merging #227 (1991edc) into main (afa4eda) will increase coverage by 0.31%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #227      +/-   ##
==========================================
+ Coverage   76.95%   77.26%   +0.31%     
==========================================
  Files          85       85              
  Lines        2703     2705       +2     
==========================================
+ Hits         2080     2090      +10     
+ Misses        441      435       -6     
+ Partials      182      180       -2     

Impacted Files	Coverage Δ
pkg/services/matrix/matrix_client.go	70.68% <ø> (ø)
pkg/services/matrix/matrix_config.go	100.00% <ø> (ø)
pkg/services/telegram/telegram_config.go	100.00% <ø> (ø)
pkg/format/render_console.go	76.92% <100.00%> (+8.50%)	⬆️
pkg/format/format_colorize.go	41.37% <0.00%> (+6.89%)	⬆️

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