chore: use extism:host/env namespace (#19)

* chore: use extism:env namespace

* doc: update namespace in readme after rebase

* fix: use extism:host/env

Author: zshipko

README.md

@@ -248,7 +248,7 @@ to do this correctly. So we recommend reading our [concept doc on Host Functions
 Host functions have a similar interface as exports. You just need to declare them as extern on the top of your main.go. You only declare the interface as it is the host's responsibility to provide the implementation:
 
 ```go
-//go:wasmimport env a_python_func
+//go:wasmimport extism:user a_python_func
 func aPythonFunc(uint64) uint64
 ```
 

env.go

@@ -2,75 +2,75 @@ package pdk
 
 type extismPointer uint64
 
-//go:wasmimport env extism_input_length
+//go:wasmimport extism:host/env input_length
 func extism_input_length() uint64
 
-//go:wasmimport env extism_length
+//go:wasmimport extism:host/env length
 func extism_length(extismPointer) uint64
 
-//go:wasmimport env extism_alloc
+//go:wasmimport extism:host/env alloc
 func extism_alloc(uint64) extismPointer
 
-//go:wasmimport env extism_free
+//go:wasmimport extism:host/env free
 func extism_free(extismPointer)
 
-//go:wasmimport env extism_input_load_u8
+//go:wasmimport extism:host/env input_load_u8
 func extism_input_load_u8_(extismPointer) uint32
 
 func extism_input_load_u8(p extismPointer) uint8 {
 	return uint8(extism_input_load_u8_(p))
 }
 
-//go:wasmimport env extism_input_load_u64
+//go:wasmimport extism:host/env input_load_u64
 func extism_input_load_u64(extismPointer) uint64
 
-//go:wasmimport env extism_output_set
+//go:wasmimport extism:host/env output_set
 func extism_output_set(extismPointer, uint64)
 
-//go:wasmimport env extism_error_set
+//go:wasmimport extism:host/env error_set
 func extism_error_set(extismPointer)
 
-//go:wasmimport env extism_config_get
+//go:wasmimport extism:host/env config_get
 func extism_config_get(extismPointer) extismPointer
 
-//go:wasmimport env extism_var_get
+//go:wasmimport extism:host/env var_get
 func extism_var_get(extismPointer) extismPointer
 
-//go:wasmimport env extism_var_set
+//go:wasmimport extism:host/env var_set
 func extism_var_set(extismPointer, extismPointer)
 
-//go:wasmimport env extism_store_u8
+//go:wasmimport extism:host/env store_u8
 func extism_store_u8_(extismPointer, uint32)
 func extism_store_u8(p extismPointer, v uint8) {
 	extism_store_u8_(p, uint32(v))
 }
 
-//go:wasmimport env extism_load_u8
+//go:wasmimport extism:host/env load_u8
 func extism_load_u8_(extismPointer) uint32
 func extism_load_u8(p extismPointer) uint8 {
 	return uint8(extism_load_u8_(p))
 }
 
-//go:wasmimport env extism_store_u64
+//go:wasmimport extism:host/env store_u64
 func extism_store_u64(extismPointer, uint64)
 
-//go:wasmimport env extism_load_u64
+//go:wasmimport extism:host/env load_u64
 func extism_load_u64(extismPointer) uint64
 
-//go:wasmimport env extism_http_request
+//go:wasmimport extism:host/env http_request
 func extism_http_request(extismPointer, extismPointer) extismPointer
 
-//go:wasmimport env extism_http_status_code
+//go:wasmimport extism:host/env http_status_code
 func extism_http_status_code() int32
 
-//go:wasmimport env extism_log_info
+//go:wasmimport extism:host/env log_info
 func extism_log_info(extismPointer)
 
-//go:wasmimport env extism_log_debug
+//go:wasmimport extism:host/env log_debug
 func extism_log_debug(extismPointer)
 
-//go:wasmimport env extism_log_warn
+//go:wasmimport extism:host/env log_warn
 func extism_log_warn(extismPointer)
 
-//go:wasmimport env extism_log_error
+//go:wasmimport extism:host/env log_error
 func extism_log_error(extismPointer)