Add project files.

.env.example

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+# The database connection string for PostgreSQL.
+# DATABASE_URL="postgres://user:password@127.0.0.1:5432/database"
+
+# The User-Agent string for HTTP requests, replace the email with yours.
+# USER_AGENT="Tildes Statistics (your-email@example.org)"

.gitignore

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+# Generated by Cargo
+debug/
+target/
+
+# Code coverage results
+coverage/
+
+# Environment configuration
+.env

Makefile.toml

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+[tasks.fmt]
+command = "cargo"
+args = ["fmt", "${@}"]
+
+[tasks.check]
+command = "cargo"
+args = ["check", "${@}"]
+
+[tasks.clippy]
+command = "cargo"
+args = ["clippy", "${@}"]
+
+[tasks.test]
+command = "cargo"
+args = ["test", "${@}"]
+
+[tasks.doc]
+command = "cargo"
+args = ["doc", "${@}"]
+
+[tasks.build]
+command = "cargo"
+args = ["build", "${@}"]
+
+[tasks.complete-check]
+dependencies = ["fmt", "check", "clippy", "test", "doc", "build"]
+
+[tasks.code-coverage]
+workspace = false
+install_crate = "cargo-tarpaulin"
+command = "cargo"
+args = [
+  "tarpaulin",
+  "--exclude-files=target/*",
+  "--out=html",
+  "--output-dir=coverage",
+  "--skip-clean",
+  "--target-dir=target/tarpaulin"
+]

rustfmt.toml

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+max_width = 80
+tab_spaces = 2