Rename .env references to project.conf and move LaTeX settings to Pandoc store

[lex57ukr]

Summary

Aligns the CLI with upstream Keystone's configuration change (knight-owl-dev/keystone#13), which replaces .env with project.conf as the operational config file. The 5 LaTeX/cover properties that don't belong in an operational config file move into the Pandoc store where Pandoc consumes them natively, leaving project.conf with only project identity and Docker variables.

Related Issues

Fixes #145

Changes

• Rename ProjectFiles.EnvFileName to ProjectConfFileName with value project.conf
• Rename EnvFileProjectModelStore to ProjectConfFileProjectModelStore, trimmed to 3 operational variables (ProjectName, DockerComposeProject, DockerImage)
• Move 5 properties (CoverImage, LatexPapersize, LatexGeometry, LatexFontsize, LatexFontfamily) to PandocFileProjectModelStore with native YAML keys (cover-image, papersize, geometry, fontsize, fontfamily)
• Update xmldoc, DI registration, tests, and CLAUDE.md to match

[Copilot]

Pull request overview

Aligns Keystone CLI configuration with upstream changes by renaming the operational config file from .env to project.conf and relocating LaTeX/cover settings into the Pandoc YAML store.

Changes:

• Replaced .env references with project.conf in project layout, DI registration, and the operational store/tests.
• Moved cover + LaTeX settings from the operational env-style store into PandocFileProjectModelStore using YAML keys.
• Updated documentation/comments to reflect the new configuration split.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tests/Keystone.Cli.UnitTests/Domain/FileSystem/TestData/StandardProjectLayout.cs	Updates expected project file layout to include project.conf (and sample project.conf).
tests/Keystone.Cli.UnitTests/Application/Data/Stores/ProjectConfFileProjectModelStoreTests.cs	Renames and updates unit tests for the new project.conf-backed operational store.
tests/Keystone.Cli.UnitTests/Application/Data/Stores/PandocFileProjectModelStoreTests.cs	Adds test coverage for cover/LaTeX values now stored in pandoc.yaml.
src/Keystone.Cli/Domain/Project/ProjectModel.cs	Updates XML doc comments to reflect where fields are sourced from (project.conf vs pandoc.yaml).
src/Keystone.Cli/Domain/Project/ProjectFiles.cs	Introduces ProjectConfFileName constant and updates remarks.
src/Keystone.Cli/Configuration/DependenciesInstaller.cs	Switches DI registration to ProjectConfFileProjectModelStore.
src/Keystone.Cli/Application/Utility/Serialization/IEnvironmentFileSerializer.cs	Generalizes docs to “environment-style configuration file” (not .env specific).
src/Keystone.Cli/Application/Data/Stores/ProjectConfFileProjectModelStore.cs	Renames store and removes cover/LaTeX keys from operational config handling.
src/Keystone.Cli/Application/Data/Stores/PandocFileProjectModelStore.cs	Adds cover/LaTeX YAML metadata bindings and hashing.
src/Keystone.Cli/Application/Data/IProjectModelStore.cs	Updates interface docs to reference project.conf instead of .env.
CLAUDE.md	Updates documentation to match the renamed store.

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[Copilot]

Pull request overview

Copilot reviewed 11 out of 11 changed files in this pull request and generated 5 comments.

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