Add user guide

[davorrunje]

Description

Please include a summary of the change and specify which issue is being addressed. Additionally, provide relevant motivation and context.

Fixes # (issue number)

Type of change

Please delete options that are not relevant.

• Documentation (typos, code examples, or any documentation updates)
• Bug fix (a non-breaking change that resolves an issue)
• New feature (a non-breaking change that adds functionality)
• Breaking change (a fix or feature that would disrupt existing functionality)
• This change requires a documentation update

Checklist

• My code adheres to the style guidelines of this project (scripts/lint.sh shows no errors)
• I have conducted a self-review of my own code
• I have made the necessary changes to the documentation
• My changes do not generate any new warnings
• I have added tests to validate the effectiveness of my fix or the functionality of my new feature
• Both new and existing unit tests pass successfully on my local environment by running scripts/test-cov.sh
• I have ensured that static analysis tests are passing by running scripts/static-anaylysis.sh
• I have included code examples to illustrate the modifications

[codecov]

Codecov Report

Attention: Patch coverage is 6.25000% with 30 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
docs/docs_src/user_guide/runtime/autogen/main.py	0.00%	12 Missing ⚠️
docs/docs_src/getting_started/main_mesop.py	0.00%	9 Missing ⚠️
...cs_src/user_guide/custom_user_interactions/main.py	0.00%	4 Missing ⚠️
docs/docs_src/getting_started/main_console.py	0.00%	1 Missing ⚠️
examples/cli/main_console.py	0.00%	1 Missing ⚠️
examples/cli/main_mesop.py	0.00%	1 Missing ⚠️
examples/cli/main_user_proxy.py	0.00%	1 Missing ⚠️
fastagency/runtime/autogen/base.py	0.00%	1 Missing ⚠️

Files with missing lines	Coverage Δ
...ocs/docs_src/user_guide/external_rest_apis/main.py	100.00% <100.00%> (ø)
...docs_src/user_guide/external_rest_apis/security.py	100.00% <100.00%> (ø)
fastagency/app.py	100.00% <ø> (+13.33%)	⬆️
fastagency/base.py	93.20% <ø> (ø)
fastagency/ui/console/base.py	96.77% <ø> (+0.10%)	⬆️
docs/docs_src/getting_started/main_console.py	0.00% <0.00%> (ø)
examples/cli/main_console.py	0.00% <0.00%> (ø)
examples/cli/main_mesop.py	0.00% <0.00%> (ø)
examples/cli/main_user_proxy.py	0.00% <0.00%> (ø)
fastagency/runtime/autogen/base.py	94.18% <0.00%> (ø)
... and 3 more