Restructure project directories (#333)

`/client/web` -> `/frontend`
`/client/cli` -> *delete for now*
`/client/native` -> *delete for now*
`/core/editor` -> `/editor`
`/core/document` -> `/graphene`
`/core/renderer` -> `/charcoal`
`/core/proc-macro` -> `/proc-macros` *(now plural)*

frontend/wasm/Cargo.toml

@@ -0,0 +1,43 @@
+[package]
+name = "graphite-wasm"
+version = "0.1.0"
+authors = ["Graphite Authors <contact@graphite.design>"]
+edition = "2018"
+readme = "../../README.md"
+homepage = "https://www.graphite.design"
+repository = "https://github.com/GraphiteEditor/Graphite"
+license = "Apache-2.0"
+publish = false
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[features]
+default = ["console_error_panic_hook"]
+
+[dependencies]
+console_error_panic_hook = { version = "0.1.6", optional = true }
+editor = { path = "../../editor", package = "graphite-editor" }
+graphene = { path = "../../graphene", package = "graphite-graphene" }
+log = "0.4"
+serde = { version = "1.0", features = ["derive"] }
+wasm-bindgen = { version = "0.2.73", features = ["serde-serialize"] }
+
+[dev-dependencies]
+wasm-bindgen-test = "0.3.22"
+
+[package.metadata.wasm-pack.profile.dev]
+wasm-opt = false
+
+[package.metadata.wasm-pack.profile.dev.wasm-bindgen]
+debug-js-glue = true
+demangle-name-section = true
+dwarf-debug-info = true
+
+[package.metadata.wasm-pack.profile.release]
+wasm-opt = ["-Os"]
+
+[package.metadata.wasm-pack.profile.release.wasm-bindgen]
+debug-js-glue = false
+demangle-name-section = false
+dwarf-debug-info = false