[SM-1096] Unify State Variable Naming

[coltonhurst]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/SM-1096

📔 Objective

The naming around state files and paths is inconsistent. This PR aims to make the usage consistent.

Every mention of state for access token auth should follow this naming logic:

state_dir <- This refers to the state directory, where state files are stored. The sdk is currently only aware of state files, directory handling is still being done in bws.
state_file <- This refers to a specific state file.

In our code we don't append naming to variables to indicate the type (Hungarian Notation), so I thought it pertinent to truncate _path from these, preferring more descriptive state_dir and state_file for the names.

Thanks @dani-garcia for pointing this out here.

⚠️ Note ⚠️ This also simplifies the state_file_dir key in the bws config file to state_dir. There will be more changes to this functionality with SM-1174, so I will wait to update the changelog for the next bws version until all this is completed.

⏰ Reminders before review

• Contributor guidelines followed
• All formatters and local linters executed and passed
• Written new unit and / or integration tests where applicable
• Protected functional changes with optionality (feature flags)
• Used internationalization (i18n) for all UI strings
• CI builds passed
• Communicated to DevOps any deployment requirements
• Updated any necessary documentation (Confluence, contributing docs) or informed the documentation
  team

🦮 Reviewer guidelines

• 👍 (:+1:) or similar for great changes
• 📝 (:memo:) or ℹ️ (:information_source:) for notes or general info
• ❓ (:question:) for questions
• 🤔 (:thinking:) or 💭 (:thought_balloon:) for more open inquiry that's not quite a confirmed
  issue and could potentially benefit from discussion
• 🎨 (:art:) for suggestions / improvements
• ❌ (:x:) or ⚠️ (:warning:) for more significant problems or concerns needing attention
• 🌱 (:seedling:) or ♻️ (:recycle:) for future improvements or indications of technical debt
• ⛏ (:pick:) for minor or nitpick changes

[github-actions]

Checkmarx One – Scan Summary & Details – bba9884d-43b1-432f-8a93-83bd057e825e

No New Or Fixed Issues Found

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 11 lines in your changes missing coverage. Please review.

Project coverage is 58.08%. Comparing base (5e5ddab) to head (341581c).
Report is 3 commits behind head on main.

Files	Patch %	Lines
crates/bws/src/state.rs	0.00%	6 Missing ⚠️
crates/bws/src/main.rs	0.00%	3 Missing ⚠️
crates/bws/src/config.rs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #895   +/-   ##
=======================================
  Coverage   58.07%   58.08%           
=======================================
  Files         194      194           
  Lines       13194    13193    -1     
=======================================
  Hits         7663     7663           
+ Misses       5531     5530    -1     

☔ View full report in Codecov by Sentry.
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[dani-garcia]

LGTM, do we need to update the changelog as well?

[mzieniukbw]

Found a typo in Go language wrapper README.md.