Fix path prefix striping on Windows.

Dependencies

• [2] GJNJ75U5 Canonicalise paths (reset and credit) before stripping off the prefix
• [3] QYY37T6Y Fixing a panic with reset --dry-run and no input
• [4] SXEYMYF7 Fixing the bad changes in history (unfortunately, by rebooting).
• [5] MU5GSJAW Partial push and pull (WARNING: breaks the existing protocol)
• [6] NLGQAH4H Credit and reset relative to current directory instead of the root
• [7] KWAMD2KR A few fixes in the documentation comments
• [8] BZSC7VMY address clippy lints
• [9] AEPEFS7O Write help for each argument
• [10] 4H2XTVJ2 Fix some mistakes in the docs
• [*] L4JXJHWX pijul/*: reorganize imports and remove extern crate

Change contents

• edit in pijul/src/commands/reset.rs at line 4
  [3.18]

  [12.1314]
  + use canonical_path::CanonicalPathBuf;
• edit in pijul/src/commands/reset.rs at line 41
  [4.98455]

  [4.98455]
  + let repo_path = CanonicalPathBuf::canonicalize(&repo.path)?;
• replacement in pijul/src/commands/reset.rs at line 56
  [4.99092]→[4.99092:99169](∅→∅)
  − let path = root.strip_prefix(&repo.path)?.to_str().unwrap();
  [4.99092]

  [4.99169]
  + let path = root.strip_prefix(&repo_path)?.to_str().unwrap();
• replacement in pijul/src/commands/reset.rs at line 62
  [2.58]→[4.97:174](∅→∅),[4.97]→[4.97:174](∅→∅)
  − let path = root.strip_prefix(&repo.path)?.to_str().unwrap();
  [2.58]

  [4.99322]
  + let path = root.strip_prefix(&repo_path)?.to_str().unwrap();
• replacement in pijul/src/commands/reset.rs at line 114
  [4.101310]→[4.101310:101391](∅→∅)
  − let path = root.strip_prefix(&repo.path)?.to_str().unwrap();
  [4.101310]

  [4.101391]
  + let path = root.strip_prefix(&repo_path)?.to_str().unwrap();
• edit in pijul/src/commands/file_operations.rs at line 42
  [4.169908]

  [4.169908]
  + let repo_path = CanonicalPathBuf::canonicalize(&repo.path)?;
• replacement in pijul/src/commands/file_operations.rs at line 51
  [4.170280]→[4.170280:170398](∅→∅)
  − let source = source.strip_prefix(&repo.path)?;

  − let target = target.strip_prefix(&repo.path)?;
  [4.170280]

  [4.170398]
  + let source = source.strip_prefix(&repo_path)?;

  + let target = target.strip_prefix(&repo_path)?;
• edit in pijul/src/commands/file_operations.rs at line 164
  [4.172786]

  [4.172786]
  + let repo_path = CanonicalPathBuf::canonicalize(&repo.path)?;
• replacement in pijul/src/commands/file_operations.rs at line 177
  [4.173175]→[4.173175:173248](∅→∅)
  − let path = if let Ok(path) = path.strip_prefix(&repo.path) {
  [4.173175]

  [4.173248]
  + let path = if let Ok(path) = path.strip_prefix(&repo_path.as_path()) {
• edit in pijul/src/commands/credit.rs at line 4
  [12.2811]

  [12.2811]
  + use canonical_path::CanonicalPathBuf;
• edit in pijul/src/commands/credit.rs at line 43
  [4.179828]

  [4.179828]
  + let repo_path = CanonicalPathBuf::canonicalize(&repo.path)?;
• replacement in pijul/src/commands/credit.rs at line 46
  [4.179954]→[4.179954:180027](∅→∅)
  − let path = root.strip_prefix(&repo.path)?.to_str().unwrap();
  [4.179954]

  [4.180027]
  + let path = root.strip_prefix(&repo_path.as_path())?.to_str().unwrap();
• replacement in pijul/src/commands/credit.rs at line 52
  [2.113]→[4.260:333](∅→∅),[4.260]→[4.260:333](∅→∅)
  − let path = root.strip_prefix(&repo.path)?.to_str().unwrap();
  [2.113]

  [4.180164]
  + let path = root.strip_prefix(&repo_path.as_path())?.to_str().unwrap();