refactor: cli module (holochain#317)

* refactor: cli module to command submodules

* add missing doc strings

* fix clippy warnings

* update cli/zome.rs

* inline some functions

* set package manager explicitly on holo integration scripts

* limit inlined functions

* implement FromStr for FieldDefinition

* refactor scaffold/app/cargo.rs

* update entry_type/crud.rs

* fix clippy warnings

* add removed fast track config

* fix clippy warnings

* prefer if else to pattern matching on boolean expressions where possible

* move warning missage to scaffold_entry_type

* remove template arg

.editorconfig

@@ -0,0 +1,15 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+indent_style = space
+indent_size = 4
+
+[*.rs]
+indent_style = space
+indent_size = 4